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Giant concrete arrows

Ancient History Expanded... What might future archaeologists 26,000 years from now debate about the ancient lost civilization that built these giant arrows.

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, Aug 28, 2013

Ancient History Expanded...

What might future archaeologists 26,000 years from now debate about the ancient lost civilization that built these giant arrows. Would they find enough of them to realize that they span an entire continent. Would they be viewed under 200 feet of ocean...or excavated under 15 layers of twisted sediment. What did they symbolize? Was there a hidden message meant for extraterrestrials, or was the answer something simple and practical?